Bowdoin Bradlee Crowninshield (October 13, 1867 – August 12, 1948) was an American naval architect who specialized in the design of racing yachts.

His younger brother Francis Boardman Crowninshield (1869–1950), married heiress Louise Evelina du Pont (1877–1958).

Crowninshield struck out on his own 18 months later, starting a yacht design and brokerage firm which quickly prospered.

[5] Crowninshield is now best remembered for his working schooners and his America's Cup contender Independence (George Lawley & Son shipyard, 1901) for Thomas W. Lawson.

[7][8] The shipyard built the "Six-Bitters" CG-130 through CG-139 for the United States Coast Guard (CG-133 would later serve as USS YP-45 during World War II).

[11] In 1902, he was fined and was sued for $10,000 for assaulting Adolphus G. McVey,[12] the yachting editor of the Boston Herald, for a remark about his wife.